klaR (version 1.7-3)

xtractvars: Variable clustering based variable selection

Description

Applies variable selection to data based on variable clusterings as resulting from corclust or CLV.

Usage

xtractvars(object, data, thres = 0.5)

Value

The data is returned where unselected coloumns are removed.

Arguments

object

Object of class cvtree applied to a corclust object or the summary() of a clv object as created by CLV.

data

Data where variables are to be selected. Coloumn names must be identical to those used in corclust model.

thres

Maximum accepted average within cluster correlation for selection of a variable.

Author

Gero Szepannek

Details

Of each cluster the first variable is selected as well as all other variables with an average within cluster correlation below thres.

References

Roever, C. and Szepannek, G. (2005): Application of a genetic algorithm to variable selection in fuzzy clustering. In C. Weihs and W. Gaul (eds), Classification - The Ubiquitous Challenge, 674-681, Springer.

See Also

See also corclust, cvtree and CLV.

Examples

    data(B3)
    ccres <- corclust(B3)
    plot(ccres)
    cvtres <- cvtree(ccres, k = 3)
    newdata <- xtractvars(cvtres, B3, thres = 0.5)